The softball game being played at the end scene is an actual game played by MWC's production crew. The woman walking backwards to the catcher's spot is Stacie Lipp (producer/writer) and the 3rd baseman is Ron Leavitt (co-creator/writer).
AL's speech before he crosses the home plate, mimics the sound similar to Lou Gehrig's speech.
Al mimics Babe Ruth's famous pointing before hitting the winning home run.
In the last softball episode, in Season 2, titled "How Do You Spell Revenge", it was Peg, not Al, who was terrible at softball.